John Hansen <hansen@OAK.AIT.FREDONIA.EDU> wrote:
> David VanHorn wrote:
> > Very little pic problems here really, mostly phone problems :)
> > If you can find it, a copy of "Understanding Telephone Electronics" from
> > radio shack is about indespensible.
> > It's about the best book on this sort of thing that money can buy.
>
> Does anyone know where this can be obtained these days?  It's
> not in the RS catalog anymore.  It is there another source for
> this type of information?

John,

I just finished some research to see what it would take to add "busy" LEDs
to twelve switch boxes sharing the same four lines (don't ask (;-)).You
might find the following useful:

    FCC Part 68 Direct Connection to the U.S. Telephone Network
    http://www.ce-mag.com/tel95a1.html

    Telephone interfacing circuits
    http://www.mmainteractive.com/electronics/phone/audio.htm
    http://www.hut.fi/Misc/Electronics/telephone.html

    TELECOM Digest and Archives
    http://hyperarchive.lcs.mit.edu/telecom-archives/

Oh, and if anyone knows of a relatively inexpensive "quad" IC designed for
direct phone connection, I'd like to hear about it (;-).


Frank McKenney            / OS/2 Advisor (OS2BBS)
McKenney Associates       / Richmond, Virginia / (804) 320-4887
Internet: rrs0059@ibm.net / TalkLink: WZ01123